Spring scale



Feb. 3, y s, G, AVERELL 1,791,111

SPRING SCALE Filed June 6. 1929 E211.- Eil-.5- jf Patented Feb. 3, 1931 UNITED STATES PATENT OFFICE SYLVESTER G. AVERELL, OF NEW YORK, N. Y., ASSIGNOR TO JOHN CHATILLON & SONS, F NEW YORK, N. Y., A CORPORATION 0F NEW YORK SPRING SCALE Application led June 6, 1929. Serial No. 368,856.

This invention relates to spring scales and more particularly to a novel construction whereby the weight is suspended directly from the hanger portion of a frame so that the axis of the scale will always assume a vertical position under all conditions of use.

A primary object of the invention is to provide a stamped metal scale frame including a hanger by which the scale and the load responsive springs are supported in such a way that there is no lateral distortion of the frame under load, thus permitting of the use of relatively thin gauge metal which not only effects economy in the making of the scale,

but contributes materially to the lightness thereof, while at the same time permitting of shaping the frame in such a way that added stiffness and strength is imparted to the entire structure.

Another object of the invention is to provide novel means for maintaining the rack in engagement with the pinion on the indicator shaft so that a uniform engagement between the rack and the pinion will be maintained for all positions of the rack during its movement.

A further object ofthe invention is to provide novel means on the frame concentric with the axis of the indicator shaft to insure the mounting of the dial plates accurately with reference to the axis of the indicator shaft.

With the above and other objects in View which will more readily appear as the nature of the invention is better understood, the same consists in the novel construction, combination and arrangement of parts hereinafter more fully described, illustrated and claimed.

A preferred and practical embodiment of the invention is shown in the accompanying drawings in which Figure 1 is a front elevation of a scale embodying the present improvements.

Fig. 2 is an elevation of the novel stamped metal frame and its associated parts, the casing of the scale being removed to better illustrate the same.

Fig. 3 is an enlarged vertical cross-sectional view taken on the line 3 3 of Fig. 2.

Fig. 4 is a horizontal cross sectional view taken on the line 4 4 of Fig. 2.

Similar reference characters designate corresponding parts throughout the several figures of the drawings.

The frame for suspending and carrying the entire scale mechanism is designated generally as F and includes a hanger H provided with a suitable opening or eye for receiving a hook or its equivalent to suspend and support the scale. The body of the lframe F is provided at its intermediate portion with a horizontal offset shoulder or shelf A which is intersected by the plane of the hanger portion H and provides at opposite sides of this plane the equi-distantly spaced sections or walls B and C. The lower end D of the frame is bent inwardly and is provided with an opening for receiving the struck-up portions E of the ring or casing G of the scale housing.

As will be observed from Fig. 2, the said hanger H is provided with the shoulder portion I for engaging with the inside of the ring G so that the said ring will be engaged at diametrically opposite points by the top and the bottom of the frame, thus centering the ring and maintaining it in position in such a way that it receives or carries none of the load imposed on the scale.

Referring to the intermediate oiiset portion A of the body of the frame F, it will be observed from Figs. 2, 3 and 4 that the same is cut or slit to permit of the formation of down-turned wings l which not only serve as a means for transversely bracing the upper and lower walls B and C but also provide clearance for the main loading springs S of the scale to facilitate their attachment to the runner M. The horizontal web 2 of the oset intermediate portion'A is also provided with an opening 3 for guiding the rack R. The lower end of the upper wall B of the frame has attached thereto a journal plate 4, the same being suitably secured to the wall as indicated at 5 and extending downwardly into the zone of the wings 1 where it is provided with an opening 6 for receiving one end of the indicator shaft 7, the opposite end of which is journaled in the opening 8 formed in the ion and d1 ill be iornnng Si. n

in the 1.311

posit' ions 7.

L. u l blnmlon Wim 125 a .langer and n planes at cale Will asslnne Vertiool po :ing seele, the Coni maine inclul an interinefliai'e horizontal .alle eianvfecl i Dosife Sides of said lian the by the hangen a iunnei arranged Jending from Scale load.

5. En a s offset Vertical lably with loooed es at OP' 1s prom one of in engagenien tion is s held 1n the sti'uol The uppe free located directli tion 21.1 which is op cable opening 25 Jeans comprising a spiln is Jthe pinion 17 and ith an offset end Dor te por 1') die.

ing; means for accurately and rel maintaining the me the pinion 17, Such 19 Whose interino 39 2O and its lo f. er end 21 23 of che spring 19 le the axis o ded W led in a. sui

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out portions 22 of the frame. end

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plane of the hanger and springs connecting the hanger and the runner.

6. In a spring scale, the combination with a casing, of a frame including ay vertical hanger and an intermediate horizontal portion forming vertical walls located at opposite sides of the plane of said hanger, a runner mounted to move in the plane of the hanger, springs connecting the hanger and the runner, an indicator sha-ft journaled in said intermediate horizontal portion, a pinion on said shaft, and a rack carried by the runner and operatively engaging with said pinion.

7. In a spring scale, the combination with a casing, of a balanced frame arranged within the casing, an intermediate st'iffened portion formed in the frame, an indicator shaft mounted in said stifened portion, springs carried by the top of the frame, a runner suspended from said springs whereby the load imposed on the runner and springs will be supported entirely from the top of the hanger and top of the frame and independently of the other portions of the frame and the casing.

8. In a spring scale, a stamped metal frame including an intermediate offset portion forming upper and lower offset vertical walls, means in said offset portion for forming a journal for the indicating shaft, said means including outwardly projecting hub portions, and dial members adapted to be centered on said hub portions.

9. In a spring scale, a stamped metal frame including a hanger portion, an intermediate offset portion and upper and lower walls arranged at opposite sides of the offset portion, said offset portion including down turned wings and provided with a rack receiving slot in the top wall thereof, and said slot being in line with the hanger portion of the frame, a journal plate carried by the upper wall ofthe frame and having a journal e onenino refristerin with a 'ournal o enin h D g in the lower wall of the frame, an indicating shaft mounted in said journeled openings, springs mounted on the hanger portion of the frame and paralleling the sides of the said wings, and a runner suspended in said springs.

In testimony whereof I hereunto affix my signature.

SYLVESTER G. AVERELL. 

